18118308 has 96 divisors (see below), whose sum is σ = 48501376. Its totient is φ = 5225472.

The previous prime is 18118297. The next prime is 18118327. The reversal of 18118308 is 80381181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248160 + ... + 248232.

Almost surely, 2^18118308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18118308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24250688).

18118308 is an abundant number, since it is smaller than the sum of its proper divisors (30383068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18118308 is a wasteful number, since it uses less digits than its factorization.

18118308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 18118308 is about 4256.5605833818. The cubic root of 18118308 is about 262.6470613600.

Adding to 18118308 its reverse (80381181), we get a palindrome (98499489).

The spelling of 18118308 in words is "eighteen million, one hundred eighteen thousand, three hundred eight".